pshoukry/tinymce-rails — comment on commit 4de9a4e9cfb6427324c003cf7e05b87ae0784ef1
File:  line 0
By pshoukry:

you need to call it with something like this:

...javascript
tinyMCE.init({
mode : "textareas",
theme : "advanced",
editor_selector : "tiny_mce",
plugins : "uploadimage",
});
...

please check:http://www.tinymce.com/wiki.php/Configuration:editor_selector